da Silva Ramos José Gustavo Venâncio, Leon Fernanda de Almeida, Michelon Leonardo Kozak, Kreutz Cristiane, Carvalho Karina Querne de, Passig Fernando Hermes
Civil Engineering Graduate Program, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil.
Chemistry and Biology Academic Department, The Federal University of Technology - Paraná (UTFPR), Curitiba, Brazil.
Environ Technol. 2023 Jan;44(1):57-67. doi: 10.1080/09593330.2021.1963323. Epub 2021 Aug 11.
Recent studies point out losses of 30-40% of the produced methane in the effluent of anaerobic reactors treating sewage, reducing the renewable energy potential and the environmental footprint. A novel bench-scale upflow anaerobic hybrid (UAHB) reactor combining a sludge blanket at the bottom and a filter media at the top, both with three-phase separators, was proposed to evaluate the recovery of dissolved methane. UAHB was operated with volumetric organic loading rate of 1.24 kg COD m d and hydraulic retention time of 8 h for 218 days to evaluate the influence of temperature (18°C, 23°C, and 28°C) in the methane dissolved in the effluent and collected from three-phase separators. Chemical oxygen demand (COD) and total suspended solids (TSS) removals efficiencies remained constant during the operation and equal to 90 and 95%, respectively, related to the activity of biomass retained in the filter media. Temperature increase influenced more the methane production in the sludge blanket rather than in the upper bed. The volume of recovered methane increased about 20% with the installation of the support media and the upper three-phase separator (3PHS). The loss of methane dissolved in the effluent was strongly influenced by the temperature, and higher with the decrease of this parameter. Non-statistically significant correlations were observed between the temperature and the methane production in the upper bed (-value = 0.0943) and total (-value = 0.0930). Thus, it can be concluded that the evaluated temperatures did not influence the global efficiency and the total methane yield of the UAHB reactor.
近期研究指出，在处理污水的厌氧反应器流出物中，所产生的甲烷有30%-40%损失掉了，这降低了可再生能源潜力和环境足迹。提出了一种新型的实验室规模上流式厌氧复合（UAHB）反应器，其底部有污泥床，顶部有过滤介质，两者均设有三相分离器，以评估溶解甲烷的回收情况。UAHB在体积有机负荷率为1.24 kg COD m⁻³ d⁻¹和水力停留时间为8 h的条件下运行218天，以评估温度（18°C、23°C和28°C）对流出物中以及从三相分离器收集的溶解甲烷的影响。在运行期间，化学需氧量（COD）和总悬浮固体（TSS）的去除效率保持恒定，分别为90%和95%，这与保留在过滤介质中的生物质活性有关。温度升高对污泥床中甲烷产生的影响比对上层床的影响更大。随着支撑介质和上部三相分离器（3PHS）的安装，回收的甲烷体积增加了约20%。流出物中溶解甲烷的损失受温度影响很大，且随着该参数的降低而增加。在上层床的甲烷产量与温度之间（p值 = 0.0943）以及总甲烷产量与温度之间（p值 = 0.0930）未观察到统计学上显著的相关性。因此，可以得出结论，所评估的温度并未影响UAHB反应器的整体效率和总甲烷产量。
